I am a grade 9 math teacher in the Yukon. I have a class that wants to
know why any number with exponent zero is equal to one. Is there an
explanation? Also, how many decimal places has pi been calculated to, and
are there any patterns emerging?

A right triangle with sides 1 and 2 has a hypotenuse equal to the square
root of 5, which is irrational - it carries on to infinity without
recurring - but the side length of a triangle must be finite!